Just bring back the M1-Garand and be done with it.
Just bring back the M1-Garand with a detachable magazine and be done with it.
Which is our beloved M14 - couldn't agree more. Damn thing fires every time you pull the trigger, hits way the hell out to 5-600 meters, and murderous in full auto (fired from the prone with a bipod and that folding buttplate for control).
And, as a bonus, you can beat the enemy to death with the rifle and not have it shatter like the toy M16.